I always thought the scene of Colossus and the students escaping in the underground tunnels in X2 was reminiscent of the X-Men trying to escape the internment camps in Days of Future Past, just before they’re attacked by sentinels. I think including something like that would be a great way to be both faithful to the books and serve as a nod to the previous films.

never thougth about that, but now that you mentioned, it really feels like a nod.

I would have loved to see more from that sequence, I loved to see Collossus helping the students and getting them out of the school, he felt like a hero. Would have been nice to see a bit more from Rogue too, helping the children